1. HIGHLIGHTS OF LAST MONTHS OF HSS ACTIVITIES
A BIG THANK YOU FOR THE EFFORTS
AND
CONGRATULATIONS FOR THE RESULTS ACHIEVED!
ABP General Group meeting - HSS

2. ABP General Group meeting - HSS
LHC production optics
Phase knob to protect TCTs from asynchronous dumps and push β*.
No to forget about the crash programme for a last minute’s request from CT-PPS
ABP General Group meeting - HSS

3. Very high b* 2.5 km for forward physics
To be tested next Thursday
ABP General Group meeting - HSS

4. Once more, optics under control
Peak beta-beating below 5% for b* 40 cm
Waist position has to be controlled at the cm level
AC dipole measurements of linear coupling during the squeeze
ABP General Group meeting - HSS

5. Non-linear optics is becoming more relevant…
Detuning with amplitude at top energy
Non-linear magnets
ABP General Group meeting - HSS

6. Beta* reach and collimation system
Beam 1
Off-momentum
Dump
TCTs
Betatron
Vertical losses
Excellent cleaning: highest cold losses ~ !
Several years of studies and HW modifications to reduce margins while ensuring adequate protection in case of fast beam failures.
ABP General Group meeting - HSS

7. Ions: full success (thanks to the contributions of many)!
ABP General Group meeting - HSS

8. PS: MTE is operational now!
ABP General Group meeting - HSS

9. HL-LHC: finalising the layout
Matching section
Matching section
D1-Triplets IP
Vacuum region under designs with colleagues from impedance and vacuum D2 D2
No beam and orbit tolerances included!
ABP General Group meeting - HSS

10. simulating synchrotron radiation in LHC, HL-LHC and FCC-hh arcs, including surface properties, using Synrad3D code
no. of reflections - smooth
model of LHC sawtooth chamber
no. of reflections - sawtooth
FCC-hh BS: sensitivity to vertical c.o.
azimuthal distributions

11. Advanced collimators concepts
Crystal channeling observed for the first time at 6.5 TeV!
Beam core
Collimator
Crystal
Halo
Active halo control
All this requires advanced simulation tools
(1) Angular scan: strong reduction of local losses in channeling compare to amorphous.
~1/30
Beam losses at crystal [ a.u. ]
Crystal angle [ μrad ]
Reduced losses in channeling
Example: scan at 450GeV
Hollow electron lens
ABP General Group meeting - HSS

12. Computing: steadily increase of activities
Contributors are welcome!
MAD-X
Four releases delivered (every ~3 months) (several fixes and improvements implemented)
Documentation improved
Training course in the context of CERN Technical Training.
New PTC from E. Forest under integration and validation
MAD-NG:
Provides a general purpose programming language and a just-in-time compiler.
Provides full support for complex, linear (LAPACK) and differential algebra (GTPSA), frequency analysis (FFT) and non-linear optimisation (ongoing)
Demonstrator with core features (tables, sequences, lines, elements)
ABP General Group meeting - HSS

13. Computing: steadily increase of activities
commits
Contributors are welcome!
SixTrack
Main code: focus on dynamics effects, clean-up code and bug-fixes, merge collimation branches, frequency analysis, beam-beam, C-library, adaptation for FCC, space-charge and low(er)-energy machines.
Tracking infrastructure: migration from AFS/LFS to other services (EOS, HT Condor), improvements to BOINC, building infrastructure.
Tools for data mining
Initiative to share data, Python tools and IT services in the group. Info at
ABP General Group meeting - HSS

14. EuCARD-2 WP5 XBEAM strategies
four deliverable reports over-
due this month (June 2016)
Preliminary strategy for future hadron & lepton colliders - draft in preparation
Preliminary strategy for future high-performance hadron rings - draft in preparation
Preliminary strategy for future high-power high-current SC linacs - draft submitted this Monday
Preliminary strategy for future polarized beams
- draft submitted this Monday
roadmaps for the future